So what is shimming and why is it important in airsoft? The tireless Matt himself does the presentation in this latest episode of Evike.com's The Training Center... "Welcome to the Eleventh episode of EvikeTV's - The Training Center! This particular series of videos will be talk about the many aspects of different airsoft guns, DIY, tutorials and to address questions that people have. This series will be a weekly episode and it will run all the way until June 2013. We will be releasing [The Training Center] episodes every Wednesday!"